Mini External USB 2.0 Sound Card 7.1 Channel 3D Audio Adapter Converter + 3.5mm Earphone MIC Interface for PC Computer Features: 1. Compact, portable, convenient to carry  2. The USB Virtual 7.1 Channel Sound Adapter is a highly flexible audio interface which can be used either with Desktop or Notebook systems, It turns your stereo speaker or earphones into 7.1 channel environment.  3. No drivers required,just plug and play for instant audio playback,also compatible with all major operaiton systems.   4. This is USB 2.0 External 7.1-Channel Audio Sound Card Adapter. It can work with either desktop or laptop. it extends your stereo speaker or earphone to 7.1 channel environment, giving you high quality sound enjoyment.    Specifications: Color: black Material: plastic Size: 56 x 25 x 18mm  LED indicators: Microphone-Mute Status, Activity  Connectors: USB Type A, Stereo output jack, mono microphone input jack  Functions keys: Microphone-Mute, Speaker-Mute, Volume-Up and Volume-Down  No drivers required for Windows 2000 / XP / Server 2003 / Vista, for Linux, for Mac OS      Packages:  1 x USB 2.0 3D Virtual 7.1 Channel Audio Sound Card Adapter